science

Karin family

Karin family is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Karin family rather than just read about it. In short: The Karin family or Karin cluster is an asteroid family and sub-group of the Koronis family. It consists of at least 90 main-belt asteroids.

Key takeaways

Karin family belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Karin family to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Karin family from memory before moving on to harder problems.

Reference excerpt

The Karin family or Karin cluster is an asteroid family and sub-group of the Koronis family. It consists of at least 90 main-belt asteroids. What makes them special is that scientists have used the orbits of 13 members to calculate backwards until they were all found to share the same orbit — that of the parent body from which they all originated. The family is named for its largest member, 832 Karin, which has a diameter of about 19 km (12 mi). It represents about 15–20% of the mass of the original body which had an estimated diameter of 33 km (21 mi). (832) Karin is an S-type asteroid. (4507) 1990FV was originally thought to be a member of the family but was identified in 2004 as an interloper. The other members have diameters in the 1–7 km range (0.6–4.3 miles). The family is believed to have been created 5.8 ± 0.2 million years ago, making it the most recent known asteroid collision. Because the surfaces of the family members are relatively pristine, spectroscopic analysis can tell scientists much about their composition and could shed new light on the question of how closely asteroids and meteorites are related. The fact that we know when their surfaces were formed will also be useful in determining the rate of crater formation in asteroids. It is estimated that in about 100 million years the family will have dispersed to a degree where it cannot be separated from the background population of asteroids. The family may also be the source of one of the interplanetary dust bands discovered by the IRAS satellite and may also have generated meteorites which would have compositions consistent with S-type asteroids and cosmic ray exposure ages of approximately 5.8 million years. A study of the Karin family has for the first time detected the Yarkovsky effect in main belt asteroids.

References

1. Nesvorný, D., et al. 2002. The recent breakup of an asteroid in the main-belt region. Nature 417(6890):720-722. 2. Nesvorný, D., Bottke, W.F., Levison, H.F., Dones, L., 2003. Recent origin of the Solar System dust bands. Astrophys. J. 591, 486–497. 3. Nesvorný, D., & Bottke, W. F. 2004. Detection of the Yarkovsky effect for main-belt asteroids. Icarus 170: 324–342. 4. Nesvorný, D et al. 2006. Karin cluster formation by asteroid impact. Icarus 183: 296–311.

Worked examples

Example 1 — a first encounter with Karin family

Start with the simplest possible case. Write down what Karin family claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Karin family before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Karin family ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Karin family

In research: Karin family appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Karin family in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Karin family is common in secondary-school and first-year university syllabi. It links to neighbouring topics Asteroid groups and families, Karin asteroids, so understanding it makes those chapters shorter.
In everyday life: Look for Karin family outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Karin family in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Karin family means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Karin family out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Karin family in simple terms?

The Karin family or Karin cluster is an asteroid family and sub-group of the Koronis family. It consists of at least 90 main-belt asteroids.

Why does Karin family matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Karin family?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Karin family.